Combined hoisting system for prestressed concrete roof panel

Abstract

The invention discloses a prestressed concrete roof panel combined hoisting system, which relates to the technical field of building construction, and comprises balance beams, the tops of the balance beams are provided with main lifting lugs which are arranged in pairs, and the balance beams are connected through connecting pieces; the sliding rails are elastically arranged at the two ends of the balance beams in a sliding mode, and the sliding rails on the same balance beam can synchronously and reversely move; the hanging ring is elastically and slidably arranged in the sliding rail; the synchronous driving structures are installed between the sliding rails on the same side and the adjacent connecting pieces, and the synchronous driving structures synchronously adjust the distance between the two ends of the connecting pieces according to the moving distance of the sliding rails and adjust the distance between the hanging rings on the different balance beams; the distance between the lifting rings can be automatically adjusted by utilizing the gravity of the components so as to adapt to lifting of the components with different sizes, manual intervention is not needed, so that the complexity of operation is reduced, the steel wire rope for connecting the components can be kept vertical, and uniform stress of the components is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly to a combined hoisting system for prestressed concrete roof slabs. Background Art

[0002] A prestressed concrete roof slab is a building component that pre-applies compressive stress during the production process of the concrete roof slab to improve its crack resistance, stiffness, and load-bearing capacity; after the roof slabs are assembled on the gable inclined beams at the top floor of the building, the wing plates overlap and cover to prevent vertical seams where light can be seen in multiple single-box roof slabs, forming a sloping roof with good integrity.

[0003] In the specific process of installing the roof slabs, construction workers must rely on a dedicated hoisting structure to steadily lift a single roof slab from the ground to the top floor position of the building, and then perform precise splicing operations to ensure the integrity and stability of the roof slabs. However, due to the fixed design dimensions of the traditional single integrated hoisting structure, it cannot flexibly adapt to the requirements of roof slabs with different size specifications, which leads to the frequent replacement of the hoisting structure in actual operations to match the sizes of different roof slabs. This not only increases the complexity and labor intensity of the construction, but also significantly prolongs the installation period. In addition, during the hoisting process, due to the fixed structure of the lifting tool, it is difficult to evenly distribute the stress points, which easily causes components such as roof slabs to crack due to uneven stress, seriously affecting the construction quality and safety.

[0004] Although the modular hoisting structure that emerged in recent years has improved this problem to a certain extent, allowing construction workers to adapt to roof slabs of different sizes by replacing or adjusting the hoisting rods, this adjustment process itself is still time-consuming and requires additional time and human resources. In addition, the size design of the roof slabs is not arbitrary, but is strictly restricted by the specific structural conditions of the roof, such as the position and spacing of the roof beams and the layout of other building components. These factors act together to make the sizes of the roof slabs diverse. This inconsistency in size further exacerbates the frequency and difficulty of replacing or adjusting the size of the hoisting structure, inevitably increasing the waiting and adjustment time during the construction process, and ultimately significantly reducing the overall efficiency of the roof slab installation operation, affecting the project progress and construction quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a combined hoisting system for prestressed concrete roof slabs, which can automatically adjust the spacing of the lifting rings to adapt to the hoisting of components with different sizes without manual intervention, thereby reducing the complexity of operation.

[0006] To achieve the above object, the present invention provides the following technical solution: a combined hoisting system for prestressed concrete roof panels, including a balance beam, characterized in that: main lifting lugs are provided at the top of the balance beam and are arranged in pairs, and the balance beams are connected by connecting members; Sliding rails are elastically and slidably arranged at both ends of the balance beam, and the sliding rails on the same balance beam can move synchronously and in opposite directions; Lifting rings are elastically and slidably arranged in the sliding rails; When lifting a component, the sliding rails can move synchronously and in opposite directions, making the lifting ropes between the lifting rings and the component tend to be vertical, and the distance between the lifting rings on the same balance beam is adjusted in real time by using the gravity of the component; A synchronous driving structure is installed between the sliding rails on the same side and the adjacent connecting members, and according to the moving distance of the sliding rails, the distance between the two ends of the connecting member is synchronously adjusted to adjust the distance between the lifting rings on different balance beams.

[0007] As a further solution of the present invention, the sliding rail includes: A sliding frame is slidably arranged at both ends of the balance beam for adjusting the distance between the lifting rings on the same balance beam; A lifting frame is slidably arranged in the sliding frame through a lifting spring, and the bottom is connected to the lifting ring; A locking member is slidably arranged on the side wall of the sliding frame and is of a wedge-shaped structure, and can adjust the normal pressure between the balance beam as the lifting frame rises and falls.

[0008] As a further solution of the present invention, the connecting member includes: A quick-release head is inserted at both ends of the balance beam, and a limiting pin is inserted through one end of the balance beam; A connecting rod is rotatably arranged at the end of the quick-release head away from the pin; An adapter is rotatably arranged at both ends with the connecting rods on the same side; Synchronous wheels are rotatably arranged at both ends of the adapter, and the hinge points of the connecting rod and the adapter are coaxially fixed.

[0009] As a further solution of the present invention, a synchronous gear is rotatably connected to the balance beam, synchronous racks meshing with the synchronous gear are fixedly arranged on the sliding rails, and a return spring is installed between the synchronous rack and the balance beam.

[0010] As a further solution of the present invention, the synchronous driving structure includes a synchronous rod, and a mounting plate is rotatably arranged on the synchronous rod, and the mounting plate is fixedly arranged on the side wall of the sliding frame.

[0011] As a further solution of the present invention, a detachable independent driving structure is commonly connected to the adapters, a mounting hole is provided in the connecting rod, the synchronous rod is rotatably arranged in the mounting hole through a bolt, and the mounting plate is fixedly arranged on the sliding frame through a bolt.

[0012] As a further solution of the present invention, the independent drive structure is a double-headed screw, and both ends of the double-headed screw are commonly threadedly connected with the connecting piece.

[0013] As a further solution of the present invention, the mounting holes are arranged in a linear array on the connecting rod, and by changing the mounting holes assembled on the connecting rod, the rotation ratio of the connecting rod when moving along the sliding rail is adjusted.

[0014] As a further solution of the present invention, a bracket is threadedly connected to the bottom of each balance beam, and a ball is arranged at the bottom of the bracket.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, by utilizing the gravity of the component itself, the steel wire rope is tightened and tends to be in a potential energy state in the vertical direction. The sliding rail moves horizontally along the balance beam to adjust the distance between the hanging rings in the length direction of the component, so as to meet the hoisting requirements of components with different lengths. At the same time, the sliding rail synchronously adjusts the distance between the two ends of the connecting piece, changes the distance between the balance beams, and realizes the synchronous adjustment of the distance between the hanging rings in the width direction of the component to adapt to the hoisting of components with different widths. Compared with the existing hoisting structure, this structure can automatically adjust the distance between the hanging rings to adapt to the hoisting of components with different sizes without manual intervention, thereby reducing the complexity of the operation.

[0016] In the present invention, the steel wire rope between the hanging ring and the component can maintain a vertical state, and the tension of the steel wire rope on the component is completely used to resist the gravity of the component, without lateral component forces. This helps to reduce the risk of component offset, can reduce the local stress at the hanging points of the component, ensure uniform stress on the component, and prevent the component from deforming during hoisting. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 Schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 Schematic diagram of the overall structure of the present invention Figure 2 ; Figure 3 For the present invention Figure 2 Schematic diagram of the enlarged structure at A; Figure 4 For the present invention Figure 2 Schematic diagram of the enlarged structure at B; Figure 5Schematic diagram of the movement state of the hook along the length direction of the component during hoisting of the component of the present invention; Figure 6 Schematic diagram of the structure for adjusting the movement of the hook by the independent drive structure of the present invention; Figure 7 Schematic diagram of the structure for adjusting the movement of the hook by the synchronous drive structure of the present invention; Figure 8 Schematic diagram of the principle for adjusting the movement of the hook by the synchronous drive structure of the present invention; Figure 9 Schematic diagram of the cross-section of the slide rail of the present invention and its connection relationship structure; Figure 10 Schematic diagram of the connecting member of the present invention and its connection relationship structure; Figure 11 Schematic diagram of the slide rail of the present invention and its connection relationship structure; In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1. Balance beam; 11. Main lifting lug; 2. Connecting member; 21. Quick-release head; 22. Pin; 23. Link; 24. Adapter; 25. Synchronous pulley; 26. Mounting hole; 3. Slide rail; 31. Slide frame; 32. Lifting frame; 33. Lifting spring; 34. Locking member; 4. Synchronous drive structure; 41. Synchronous rod; 42. Mounting plate; 51. Synchronous gear; 52. Synchronous rack; 53. Return spring; 6. Hoisting ring; 7. Independent drive structure; 8. Bracket. Detailed implementation manners

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1 - 11 , the present invention provides a technical solution: a combined hoisting system for prestressed concrete roof slabs, including a balance beam 1: main lifting lugs 11 are provided at the top of the balance beam 1 and are arranged in pairs, and the main lifting lugs 11 are connected to the traveling crane steel wire ropes; the balance beams 1 are connected by connecting members 2; the connecting members 2 are arranged at both ends of the balance beam 1, and the balance beam 1 and the connecting members 2 together form a rectangular frame; Slide rails 3, elastically and slidably arranged at both ends of the balance beam 1, and the slide rails 3 on the same balance beam 1 can move synchronously and in opposite directions; Hoisting rings 6, elastically and slidably arranged in the slide rails 3; connected to the steel wire ropes for hoisting PC components; When the component is lifted, the steel wire rope between the component and the lifting ring 6 is gradually straightened. After the steel wire rope connected to the lifting ring 6 is straightened, the balance beam 1 continues to rise. Under the action of this steel wire rope, the slide rail 3 moves synchronously in the reverse direction, making the lifting rope between the lifting ring 6 and the component tend to be vertical. After the steel wire rope area is vertical, the component is lifted and suspended, and the distance between the lifting rings 6 on the same balance beam 1 is adjusted in real time by using the gravity of the component; The synchronous drive structure 4 is installed between the slide rail 3 on the same side and the adjacent connecting member 2. When the slide rail 3 moves, the distance between the two ends of the connecting member 2 changes with the movement of the slide rail 3, realizing the synchronous adjustment of the distance between the balance beams 1, that is, the distance between the lifting rings 6 on different balance beams 1; In summary, before the component is lifted, by using the gravity of the component itself, the steel wire rope is tightened and tends to the potential energy state in the vertical direction. At this time, the slide rail 3 moves horizontally along the balance beam 1 to adjust the distance between the lifting rings 6 in the length direction of the component, so as to meet the hoisting requirements of components with different lengths. At the same time, the slide rail 3 synchronously adjusts the distance between the two ends of the connecting member 2, changes the distance between the balance beams 1, and realizes the synchronous adjustment of the distance between the lifting rings 6 in the width direction of the component to adapt to the hoisting of components with different widths. Compared with the existing hoisting structure, this structure can automatically adjust the distance between the lifting rings 6 to adapt to the hoisting of components with different sizes without manual intervention, thus reducing the complexity of operation. In addition, the steel wire rope between the lifting ring 6 and the component can maintain a vertical state, and the tension of the steel wire rope on the component is completely used to resist the gravity of the component, without lateral component force, which helps to reduce the risk of component deviation, can reduce the local stress of the component lifting points, ensure uniform force on the component, and prevent the component from deforming during hoisting.

[0021] As a further solution of the present invention, the slide rail 3 includes: A sliding frame 31 is slidably arranged at both ends of the balance beam 1 for adjusting the distance between the lifting rings 6 on the same balance beam 1; A lifting frame 32 is slidably arranged in the sliding frame 31 through a lifting spring 33, and the bottom is connected to the lifting ring 6; A locking member 34 is slidably arranged on the side wall of the sliding frame 31 and is a wedge-shaped structure, which can adjust the normal pressure between the lifting frame 32 and the balance beam 1 as the lifting frame 32 rises and falls; See details in Figures 1 - 3 、 Figure 5 and Figure 9, when the steel wire rope connected to the lifting ring 6 is stressed and tightened, the balance beam 1 continues to rise. At this time, the sliding frame 31 is subjected to the pulling force of the steel wire rope and can move along the horizontal direction of the balance beam 1 to adjust the spacing of the lifting rings 6 in the length direction of the component. At the same time, the lifting frame 32 slides vertically along the sliding frame 31 under the pulling force of the steel wire rope. On the one hand, it increases the spacing between the balance beam 1 and the component to be lifted, prolongs the moving time of the sliding frame 31, and makes the steel wire rope connected to the lifting ring 6 more vertical. On the other hand, when the lifting frame 32 descends, it will press the locking member 34 of the wedge-shaped structure, and the locking member 34 will then press the balance beam 1, increasing the normal pressure between the locking member 34 and the balance beam 1. After the component is lifted, the gravity of the component is used to lock the sliding frame 31 and the balance beam 1 to prevent the positions of the sliding frame 31 and the lifting ring 6 from changing during the lifting process of the component, avoid the center of gravity deviation of the component to be lifted, and ensure the safety of the lifting process. And after the component to be lifted is lifted to the designated position and propped up, the sliding frame 31 and the balance beam 1 are unlocked, further reducing the degree of manual participation and improving the lifting efficiency.

[0022] As a further solution of the present invention, the connecting member 2 includes: A quick-release head 21, which is inserted at both ends of the balance beam 1, and a limiting pin 22 is inserted through one end of the balance beam 1; A connecting rod 23, which is rotatably arranged at one end of the quick-release head 21 away from the pin 22; An adapter 24, with both ends rotatably arranged on the connecting rod 23 on the same side; Synchronization wheels 25, which are rotatably arranged at both ends of the adapter 24, and the hinge point of the connecting rod 23 and the adapter 24 is coaxially fixed; See Figure 1 、 Figure 6 and Figure 10 , the quick-release head 21 is inserted into the end of the balance beam 1, and the pin 22 is inserted through one end of the quick-release head 21 passing through the balance beam 1, and the quick-release head 21 is fixed in the perforation of the balance beam 1 through the pin 22, so that the connecting member 2 can be quickly installed on the balance beam 1, and then the assembly work of the lifting structure framework can be realized; When any one of the connecting rods 23 is pushed by the synchronous drive structure 4, the mutually meshing synchronization wheels 25 can drive the other connecting rod 23 to rotate synchronously in the opposite direction, so as to keep the center of gravity of the lifting structure stable and improve the safety of the lifting operation; During the rotation of the connecting rod 23, the adapter 24 will move along the length center line of the lifting structure, and the outer end of the connecting rod 23 will drive the balance beam 1 to move to both sides, thereby adjusting the spacing of the balance beam 1 and the lifting rings 6 in the width direction of the component.

[0023] During the adjustment stage of the hoisting structure, the operator can adjust the rotation angle of the connecting rod 23 according to the moving distance of the sliding frame 31 according to the actual hoisting requirements, so as to realize the regulation of the overall layout of the hoisting structure. This process not only enhances the flexibility of the hoisting operation, but also significantly improves the adaptability to components of different sizes.

[0024] As a further solution of the present invention, the synchronous drive structure 4 includes a synchronous rod 41 that moves along the length direction of the component. The synchronous rod 41 is rotatably provided with a mounting plate 42, and the mounting plate 42 is fixedly arranged on the side wall of the sliding frame 31; Specifically, referring to Figure 1 、 Figure 7 and Figure 8 , during the process of the balance beams 1 moving away from and approaching each other, the movement processes are completely opposite. Here, only the movement of a single balance beam 1 moving away from each other is described; When the sliding frames 31 move away from each other along the length direction of the balance beam 1, the mounting plate 42 moves accordingly. The outer end of the synchronous rod 41 rises relative to the balance beam 1 and rotates counterclockwise (taking Figure 7 as an example). The connecting rod 23 rotates clockwise relative to the balance beam 1. Due to the interaction of the two ends of the connecting rod 23 and the limitation of the connecting piece 24, the inner end of the connecting rod 23 can only move along the length direction of the component, and the outer end of the connecting rod 23 drives the balance beams 1 to move away from each other, so as to realize the proportional adjustment of the distance between the lifting rings 6 in the width direction of the component according to the moving distance of the sliding frame 31; As a further solution of the present invention, the balance beam 1 is rotatably connected with a synchronous gear 51. Synchronous racks 52 meshing with the synchronous gear 51 are fixedly arranged on the slide rails 3. A return spring 53 is installed between the synchronous rack 52 and the balance beam 1; Specifically, referring to Figure 1 、 Figure 2 and Figure 11 , when one of the sliding frames 31 moves, it drives the synchronous rack 52 fixedly arranged thereon to move synchronously. The synchronous gear 51 rotates and drives the other sliding frame 31 on the other side to move synchronously and in the opposite direction through the other synchronous rack 52, so as to realize the synchronous and reverse movement of the slide rails 3, ensure that the center of the component coincides with the center of the hoisting structure, and improve the safety of component hoisting.

[0025] As a further solution of the present invention, the connecting pieces 24 are commonly connected with a detachable independent drive structure 7. The connecting rod 23 is provided with a mounting hole 26, and the synchronous rod 41 is rotatably arranged in the mounting hole 26 through a bolt. The mounting plate 42 is fixedly arranged on the sliding frame 31 through a bolt; Specifically, when the synchronous rod 41 is separated from the connecting rod 23 and the independent drive structure 7 is installed, the synchronous movement between the sliding frame 31 and the connecting rod 23 is released. When the length and width of the hoisted component are not in equal proportion, the distance between the lifting rings 6 in the width direction of the component can be adjusted separately through the independent drive structure 7, so as to increase the applicable range of the hoisting structure and improve the practicability of the hoisting structure.

[0026] As a further solution of the present invention, the independent drive structure 7 is a double-headed screw, and both ends of the double-headed screw are commonly threadedly connected to the connecting member 24; the threads at both ends of the double-headed screw are opposite. When the double-headed screw is rotated, the connecting member 24 can move in the reverse direction, and the connecting member 24 can be separated from the double-headed screw by rotating the double-headed screw; As a further solution of the present invention, the mounting holes 26 are arranged in a linear array on the connecting rod 23. By changing the connecting rod 23 to assemble different mounting holes 26, the rotation ratio of the connecting rod 23 when moving along with the slide rail 3 is adjusted; making it applicable to components with different length-width ratios.

[0027] As a further solution of the present invention, a bracket 8 is threadedly connected to the bottom of each balance beam 1, and a ball is arranged at the bottom of the bracket 8; the bracket 8 can support the balance beam 1, and the ball can reduce the resistance between the balance beam 1 and the ground when the distance between the balance beams 1 is adjusted, and reduce the difficulty of the size of the hoisting system.

Claims

1. A combined hoisting system for prestressed concrete roof panels, comprising a balance beam (1), characterized in that: The top of the balance beam (1) is provided with main lifting lugs (11) which are arranged in pairs, and the balance beams (1) are connected by connecting pieces (2); The slide rails (3) are elastically and slidably arranged at both ends of the balance beam (1), and the slide rails (3) on the same balance beam (1) can move synchronously and in opposite directions; The lifting rings (6) are elastically and slidably arranged in the slide rails (3); When the component is lifted, the slide rails (3) can move synchronously and in opposite directions, so that the suspension ropes between the lifting rings (6) and the component tend to be vertical, and the distance between the lifting rings (6) on the same balance beam (1) is adjusted in real time by using the gravity of the component; The synchronous driving structure (4) is installed between the slide rails (3) on the same side and the adjacent connecting pieces (2), and according to the moving distance of the slide rails (3), the distance between the two ends of the connecting piece (2) is synchronously adjusted to adjust the distance between the lifting rings (6) on different balance beams (1).

2. The combined hoisting system for prestressed concrete roof slabs according to claim 1, wherein: The slide rail (3) includes: The sliding frame (31) is slidably arranged at both ends of the balance beam (1) and is used to adjust the distance between the lifting rings (6) on the same balance beam (1); The lifting frame (32) is slidably arranged in the sliding frame (31) through a lifting spring (33), and the bottom is connected to the lifting ring (6); The locking piece (34) is slidably arranged on the side wall of the sliding frame (31) and is of a wedge-shaped structure, and can adjust the positive pressure between it and the balance beam (1) as the lifting frame (32) moves up and down.

3. The combined hoisting system for a prestressed concrete roof panel according to claim 1, wherein: The connecting piece (2) includes: The quick-release head (21) is inserted into both ends of the balance beam (1), and a limiting pin (22) is inserted through one end of the balance beam (1); The connecting rod (23) is rotatably arranged at one end of the quick-release head (21) away from the pin (22); The connecting piece (24) is rotatably arranged at both ends with the connecting rods (23) on the same side; The synchronous pulleys (25) are rotatably arranged at both ends of the connecting piece (24), and the hinge points of the connecting rod (23) and the connecting piece (24) are coaxially fixed.

4. A combined hoisting system for prestressed concrete roof panels according to claim 1, characterized in that: The balance beam (1) is rotatably connected with a synchronous gear (51), the slide rails (3) are both fixedly provided with synchronous racks (52) meshing with the synchronous gear (51), and a return spring (53) is installed between the synchronous rack (52) and the balance beam (1).

5. A combined hoisting system for prestressed concrete roof slabs according to claim 3, characterized in that: The synchronous driving structure (4) includes a synchronous rod (41), and a mounting plate (42) is rotatably arranged on the synchronous rod (41), and the mounting plate (42) is fixedly arranged on the side wall of the sliding frame (31).

6. The combined hoisting system for a prestressed concrete roof slab according to claim 5, wherein: The connecting pieces (24) are jointly connected with a detachable independent driving structure (7), the connecting rod (23) is provided with a mounting hole (26), the synchronous rod (41) is rotatably arranged in the mounting hole (26) through a bolt, and the mounting plate (42) is fixedly arranged on the sliding frame (31) through a bolt.

7. A combined hoisting system for prestressed concrete roof slabs according to claim 6, characterized in that: The independent driving structure (7) is a double-headed screw, and both ends of the double-headed screw are jointly threadedly connected with the connecting piece (24).

8. A combined hoisting system for prestressed concrete roof slabs according to claim 7, characterized in that: The mounting holes (26) are arranged in a linear array on the connecting rod (23), and by changing the connecting rod (23) to assemble different mounting holes (26), the rotation ratio of the connecting rod (23) when moving with the slide rail (3) is adjusted.

9. The combined hoisting system for prestressed concrete roof slabs according to claim 1, characterized in that: Each balance beam (1) is threadedly connected with a bracket (8) at the bottom, and the bottom of the bracket (8) is provided with a ball.

Images